Refuse-burner.



H. RAGOT..

REFUSE BURNER.

APPLIuATIoN FILED 0051.12, 1912.

' 4 -sHBETs-SHEET 1.

a JNVENTOR.

6V W Y 11m/11m. 15%

WITNESSES: f2

THE NOKRIS PETERS CO.. PHoT0LlTHD wAsrHlvmuw, n. C.

H. RAGOT. REFUSE BURNER.

APPLICATION FILED 00T. l2. 1912.

1,113,829. v Patented Oct. 13, 1914.

4 SHEETS-SHEET 2.

UM @M/M. 25%

A TT ORNE Y.

THE NDRRIS PETERS C0.. PHOTo-LITHG.. WASHINGTON. D. C.

H. RAGOT.

REFUSE BURNER..

APPLIQATION FILED 00T. 12, 1912.

1, 1 1 3,829. Patented occ. 13, 1914,

4 SHEETS-SHEET 3.

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. WITNESSES; www @0m/ W ATTORNEY.

OTOLITHO,. WASHINGTON. D. C.

H. RAGOT. RBPUSBBURNBR AHLIGATION FILED 00T.12, 1912.

1,1 1 3,829. Patented 0G11. 13, 1914.

4 SHEETS-SHEET 4.

H11 IN? Wl diluir? WTNESSES: INVENTOR.

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rmiTEn srATEs PATENT oEEioE.

HENRY anser, or LAWRENCE, iviassiicnusnr'rs, Assiefnoa or ONE-HALE To DEMAnEsr LLOYD, or Bosron, Massacnusnrrs.

REFUSE-BURNER.

Speccaton of Letters Patent.`

Patented Oct. 13, 1914.

Application filed ctober 12, 1912. Serial No.` 725,440.

To all whom 'it may concern Be it known that l, HENRY ltAeor, a citizen of the United States, residing at Laivrence, in the county of Essex and State of Massachusetts, have invented certain new and useful improvements in Refuse-Burners. of which the following is a specification.'

lilly invention relates te furnaces and to the burning of materials Where an intense heat and complete combustion is desirable. lt can be used as a furnace or lire place for many purposes but it is peculiarly adapted for the destruction of Waste material from stores, factories, tanneries and houses such as decomposed vegetable matter of any kind, decayed fruit, oi'l'al, dead animals and particularly garbage. By my method and by my device, such Waste material is desiccated., carbonized and burned from the top or outside downward or inward whereby no odor is permitted to escape therefrom.

My device is preferably so constructed that dry combustible Waste material suoli as paper, excelsior, etc., can be used as fuel to provide heat for the destruction of wet Waste material such as garbage vas Well as for its own consumption.

`le/vices for carrying out my invention comprise tvvo connected furnaces of which one is above, at some distance from and preferably not directly over the other. The flue from the lower enters the upper and the oxidizing flame and products of combustion from the lower pass into the upper at an intense heat. rlmhe upper furnace is so constructed that the Wet material rests on the floor thereof and the heat, blaze and flame from the loiver furnace are so directed as to completely envelop it.

,is wet Waste ymaterial such as garbage is apt to have a bad smell.J it is desirable to expel the Water and to burn it in suchy a way that the smell will not be carried out with the smolre or steam to the annoyance of residents of the neighborhood.` ylChis l ac-v complish by plc. the Wet vaste or gan bage in a secondary furnace and by direct-` ing upon it an oxidizing `iiame of intense heat, say 2,400 degrees. By so doing, the

moisture therein instead of being slowly evaporated is almost 4instantly converted into superheated steam. is superheated steam has no odor, there is no oder leaving the incinerator with the steam. After the moisture is expelled or While it is being expelled, the inflammable gases, if any,

are also expelled and burned leaving the residue from the garbage in a carbonized condition. l

lis l introduce an excess of air into the fla-me before it reaches the Wet Waste, any inflammable gases therefrom immediately burn and the carbonized residue also rapidly burns. As allv this takes place in the intensely heated secondary furnace, and the wet Waste burns on the outside lirst, all odorous substances are decomposed and burned leaving no smell Whatever.

is it isthe organic matter of the Wet waste Which contains or decomposes into objectionable organic gases and as it is also the organic` matter which harbors germs of disease and as l envelop such matter with the intense burning heat from an oxidizing fleurie., all germs are killed and' all organic matter and gases Which are decomposed and converted into inorganic matter and gases are not objectionable nor injurious to health. l so direct my flame as from a blow pipe that no germs, odors or gases from the Wet Waste can escape Without passing through an intensely hot oxidizing flame. The heat and gases from the primary furnace before they enter the secondary furnace are charged with an excess ofV oxygen. The

flues, chimney and furnaces of my devicey should `be so proportioned that the very hottest part of the llame from the primary furnace Will strike the Wet Waste in the secondary furnace. f

- My primary flue is preferably contracted toward its outlet and is so provided With adjustableair inlets that the flame passing through it becomes surcharged With air and leaves the flue like the blast from a blow pipe or from a gas torch at an intense heat. By contracting the flue, there is a tendency for the flame to contract therein and to ex pand when it enters the secondary furnace.

My invention covers the process of destroying and burning Wet Waste materialby directing thereon in a suitable chamber an process of obtaining such flame from dry waste material. f

My process is the subject of a separate application for patent which is a division hereof and is pending herewith. I prefer to use the devices illustrated and described herein for carrying out my invention.

If no dry waste material is available I can use coal, wood or liquid hydrocarbon fuel.

In the drawings, Figure 1 is a vertical sectional view from the side of an incinerator of my construction. Fig. 2 is a vertical sectional view from the front as on the line X-Y of Fig. 1. Fig. 3 is a front elevation and F ig.` 4 is a plan view. Fig. 5 is a horizontal sectional view as on the line S-T of Fig. l. Fig. 6 is a fragmentary elevation from the side and also shows part of the secondary furnace broken away. Fig. 7 is a perspective view of part of the grate bars of the primary furnace. Fig. 8 is a fragmentary vertical sectional section of a por- .tion of the wall of the secondary furnace. Fig. 9 is a plan view and Fig. l0 is a side elevation with parts broken away of a modified construction.

The primary furnace of my preferred `construction is of very simple construction comprising a chamber with an inclined front wall or apronv at the top of which is an opening or door vthrough which dry refuse can be pushed from the platform on which it is v dumped. At the bottom of this incline is a special.form of grate through which air can reach the fuel and which can be readily ycleared of melted matter such as slag clinkers, tin cans, bottles,'etc. To overcome the well known difficulty of burning packed paper and other similar material, I provide a series of stoke holesbelow the ordinary level of such fuel whereby it can be stirred `vup to permit the air to reach-its different parts. Y. y

The whole devicefis made on the outside of yordinary red brick and on the inside yof fire brick with substantially no metal parts on the inside except the grate of the primary furnace. On account of the intense heat, in a largefurnace any metal part would soon be melted and rendered useless.

In ,thev preferred construction shown in Figs-1, 2,3, 4, 5 and 6, A represents the fire box of the primary furnace and comprises side walls 30 and 31, a top wall 33, a back wall 60 and a front wall forming an apron U which slopes downward on an incline from the fuel feed opening P at the end of a platform V. The dry waste material or other fuel is dumped on platform V. The opening P preferably has a door 36. Near the. bottom, front wall U is provided with a lcleanout opening S. I prefer to place across `this opening S two Hat removable trans- -verse bars 40 and 41 whose ends rest in brackets 42 and 43 at each side so that they can be removed at will leaving opening S entirely clear. These bars 40 and 41 are so shaped and placed, the lower in advance of the upper, that they extend the front wall U and thus catch any sawdust or like material which otherwise might fall out through the clean out opening S. The bottom of fire box A is open except for grate bars T which are preferably of metal and extend from back to front into opening S. rlhey are supported by grate bar supports 45 which run crosswise into the side walls and have slots at the top through which bars 'I can slide. When slid out, they can rest on support 47 as shown by the dotted lines.

Grate bars T are preferably wide and flat and the spaces between them, which are determined by the slots in supports 45, are relatively very narrow, so that sawdust, excelsior and other small light material will not fall through so readily. I prefer also to provide a poker hole 34 in the top 33 whereby a poker can be introduced from the top when the cover 35 is removed to break up slag, clinkers, etc. By this construction one or more grate bars can be pulled. out from the front from under any part of the fire desired and the clinkers which have been broken up from top poker hole 34 or otherwise can be thus dropped into the ash pit. Or one or more grate bars may be pulled out and the clinkers pushed through the opening thus made by a poker inserted through hole 34. By removing the clean out bars 40 and 4l, the grate bars T can also be readily reached with a rake or clean out hoe and any non-inflammable material, clinkers, slag, melted bottles, etc., can be drawn out without interfering with the fire.

In the side wallsof chamber A, I provide a series of lower stoke holes 11 which preferably have individual pivotedvcovers 51 and an upper series of stoke holes l() with individual pivoted covers 52. Through these stoke holes, a poke can be introduced for the purpose of stoking, spreading and leveling the fuel and of stirring up the fire. Fire box ik is extended in the form of a large relatively long primary flue C which is re* duced in size as it extends away from A and is turned upward at D where it flares outward as it enters the secondary chamber E which serves as the fire box of the secondary furnace.

brick so that it enters ilue C ina heated condition and supplies the llame with an excess of oxygen. l also prefer to provide an upper set of air inlet-s which have slid ing covers 55, in the side walls of the upper part of chamber A, whereby an excess of air may be gradually introduced or drawn in from that point and carried along by the draft with the flame becoming heated as it travels through iiue The second chamber E is preiierably of substantially circular forni in horizontal section with a donned ceiling 7G. rllhis ceiling T0 'forms the ii 'or oil the top of chamber l1) and through this 'top are L,lurality of wet waste iieed openings tl rough which the garbage or other wet was to be consumed is dropped 'from where it is de lirered on platform li.

.its the top of secondary lire box ld of considerable thiclniess. l am enabled to use metal covers openings l without. the covers being melted by the intense heat, especially as they re placed near the outside of the chamber and out of direct line from ilue outlet D. More# over as the domed `ceiling deilects the shear' oit 'llame and the current oi' hot air 'trom ilue outlet D over and downward past the inner ends of the wet waste openings lil at a` distance 'from the covers thereof, they are keptrelatively cool. This current sweep-` ing past the inner ends of openings K also prevents any refuse from being blown or carried out through them.

Surrounding the outlet D of flue C is an annular ridge or sill 7l which serves to prevent the wet waste or the liquid portion thereof from running over into flue C. The vertical cylindrical walls R of chainber E have at their bottom a plurality of openings 'TQ which are continued upward as secondary lines lil through walls R and over ceiling T0 through the top ot the seconda-ry chamber until they enter the base of a vertical smoke stack l. These lues are arranged at regular intervals and thewet waste openings K are located between them so that the piles of wet waste 20 will lie between the lines. lt is manifest that the 'llame from primary flue C of primary chamber it will reverberate on ceiling 70 and will be directed with tremendous 'torce and intense heat on the piles 20 so to envelop them and will then escape through iiues H into chimney The chimney l should preferably be `oi' considerable height so that the draft will be su'cient.

The incline or apron ll is especially built at such an angle that the dry refuse when it is pushed through the it'uel door or opening P will roll over and over and will not pack together whereby the air will not be prevented from circulating through it and the gases generated therein by the heat are for these wet waste feed given a free outlet. The angle or slope of apron Uis suilicicntly flat so that the `body7 oit the material will partly rest thereon and will not drop in a solid mass onto the grate bars. Eis it luirns at `the bottom, it will eji'adually roll down aided by the stoking of the lire and by its own weight. making `this apron on a slope, the cleaning of have pivoted covers a5 in which are mica,

'panes through which the interior of the furnace can be watched. I also provide clean out openings 77 having plugs 78 between the iiues H on a level with the floor of the secondary furnace and adjoining the piles of wet waste whereby the ashes or burned residue may be raked out leaving the floor clear. .It is desirable to keep the floor as clear as possible so that the porous brick of which it is preierablymade will `be heated to an intense heat withlthe result that when wet waste is dumpedthereon, this hot l'looi' assists very materially in `rapidly expelling the moisture. In fact this floor becomes so hot that when moist garbage or waste materialiis dropped upon it, the moisturetherein is flashed into steam and becomes immediatelyv superheated by the intense heat of the chamber'. As the openings of the secondary ilues H are on a level with the material dumped thereon, the draft necessarily passes over and around this material whereby the hot blast completely envelopsit p order to reach the ilues.

The material 20 which is dumped into the secondary furnace as soon as it reaches the intensely hot iloor is instantly subjected to such an intense heat from a lia-me which also carries an excess of oxygen that the moisture is almost instantly expelled and becomes superheatedsteam while any gases of disagreeable odor either unite with the oxygen and burn or are decomposed by the intense heat and become cheodorized.` ln any event, they become inorganic and harmless.

lf the ducts N do not furnish a suilicient excess of oxygen, the side openings 54 can be opened more or less thus admit-ting still more air at the pleasure of lthe operator. 0r the passage M may be closed entirely and the excess of air admitted `entirely through side openings 54e. In "either case, as the openings 5e and ducts N are placed along the course of the dra-ift and as each admits a relatively small amount. of air, the fire is notl cooled off nor the draft checked. On

`.the contrary, air isdrawn in llike itis inarl l ao ' 'withv the general draft.

l waste is dumped into the secondary furnace,

the openings 511 can be opened while the draft is forced by clearing the grate bars,

`feeding heavily and stoking` rapidly andV using wood or coal fuel if necessary.

1t will beobserved that there are no openings through which cold air can be admitted to the reverberatory secondary furnace as the stolre holes 74; are very small and the wet waste openings K would be more likely to permit het air. to escape than cold air to enter. The clean out openings 77 are only opened :for a very brief time. Moreover, the reverberatory ceiling and the course of the hot air' prevents any cold air from entering. On 'this account, there is no cooling down of the incinerator at any time. v

1f itis not possible to secure a sufficient supplyof drywaste material, 1 can use coal or wood in the primaryl furnace or by removing the transverse bars 4:0 and al, 1 can introduce the nozzle of ran oil burner.

One great-advantage of my construction is, that the course ofthe draft is substantially `direct and unobstructed. 1t is directed around the secondary furnace in such awayas to .envelop the wet waste and to do its Work thereon but without interfering As there are no metal vties to be heated there is no danger of expansion drawing the bricks out of true.

1t, Ais understood that 1 can use one or more primaryfurnaces leading into a single secondary furnace and that 1 can use my device for the destruction of garbage or of any wet Waste material.

I show in Figs. 9 and l0 a simple modification of my construction which can be used for destroying` somey classes of waste material especially where it is to be done in small quantities.- This form is adapted for use by private housesv where a relative-ly small quantity of garbage and dry waste are made. e l 8O isla primary furnace which has a fire box 81 with a feed door 82, grate bars 83 and an ash pit 8,4 with an ash door 85. It may be of metal or any other suitable material. f f

The flue 86 from the primary furnace tapers toward the top and is provided with air holes 87 preferably covered with a slide 88 whereby anexcess of air may be admitted and this flue 86 enters or passes through the floor 91 of' the secondary furnace 90 which may be made of metal and has cylindrical walls 92 and a flat top 93. The iue 86 projects upward at 94; forming a protecting` sill which prevents any liquid from running down into flue pipe 86.

A plurality of secondary fines 96 connect at their bottoms by openings 97 with the bottom of secondary furnace 90 whereby the flame and products of combustion must leave the secondary furnace at the bottom. A plurality of wet waste openings 98 are provided between the secondary tlues.

The operation is the same as in the first described device. That is to say, the parts are so proportioned that the hottest part of the flame or blaze created in the primary furnace will strike the outside of the piles of wet waste 99 and envelop them thereby desiccating, decomposing and consuming it without giving any opportunity for objectionable gases, odors or germs to escape.

rllhese are the most ii'nportant features of my process and of the machines for carrying` it out, as it is my purpose to carry the fiume and heat from a primary furnace fed with an excess of air through a relatively long flue wherein thorough combustion takes place forming an intensely hot oxidizing fiame which is conducted into4 a secondary furnace in such a manner that it will completely cover or envelop the refuse therein and will. leave the secondary furnace through fines from the bottom thereof. The distance from the entrance to the exit should be relatively short and the secondary furnace should receive no air except the heated air which comes through the primary flue.

1 do not intend to gradually dry out the wet waste but to subject it to an intense oxidizing flame whereby it is scorched and seared while the heat penetrates the mass and I so direct my flame that anything from the wet waste must pass through it thereby being rendered innocuous. 1n this way, 1 dispense with the use of the fire frequently used near the smoke stack of incinerators.

1t is manifest that my primary furnace can be used for the destruction of dry waste whether or not there is any wet waste in the secondary furnace. 1t is also manifest that in such case, the secondary furnace can be dispensed with and the primary furnace used alone. Its peculiar advantages for burning dry waste material are the apron which leads downward from the feed opening, the removable clean out ba `s 4t() and kil, the grate bars sliding -in slots in their ree speetive supports, the poker hole 84 through which the clinkers may be broken up, the two sets of stoke holes l0 and 11 with suitable covers which permit a poker to be inserted in the body of the lire, and the air inlets 54 arranged side by side in the direction of the draft and on each side of the primary fire boX. r1`his arrangement allows the dry waste to be fed along the apron U gradually, to spread it out through the side Stoke holes, to break any molten material or clinlrers through the top poker hole and to remove such material either through the clean out opening by removing the clean out bars 4,0 and ll or by sliding out the grate bars a suflicient distance, while the side air inlets 54 give an excess of air above the lire' whereby the smoke and gases are completely consumed.

Vilhat I claim as my invention and desire to cover by Letters Patent, is:

l. ln an incinerator, thev combination of a primary furnace having a feed opening and a grate, and a primary ilue which extends from the primary furnace and into which enter ducts from the outsideair, with a secondary furnace through the floor of which the said flue enters and having a domed ceiling, a plurality of secondary flues which extend at intervals from the bottom of the side walls `of the secondary furnace and enter a stack, together with feed openings between the secondary lines as described.

2. ln an incinerator, the combination of a primary furnace, `and a primary flue which extends from the primary furnace, with a secondary furnace having a domed ceiling through the floor of which the said flue enters, and a plurality of secondary flues which extend at intervals from the bottomv of the side wall of the secondary furnace, together with feed openings in the secondary furnace as described.

3. ln an incinerator for waste "material, a primary furnace having a feed opening,` an inclined apron extending downward therefrom, and grate bars at the bottom` thereof, together with aprimary flue which extends from the primary furnace in a horizontal direction and is reduced in size as it extends and which terminates in `a vertical, flaring outlet, combined with a secondary furnace having a domed ceiling through the floor of` which said outlet enters, a sill around said outlet, and flues which extend from the bottom of the vertical walls of the secondary furnace upward into a comnion stach, feed openings in the secondary furnace, and clean out openings in the secondary furnace as described.

Ll. ln an incinerator for waste material, a primary furnace lhaving' a feed opening, an inclined apron which extends downward therefrom, and grate bais at the bottom of the apron, together with a primary flue which extends from the primary furnace in a horizontal direction and is reducedy in size as it extends therefrom and which terminates in a vertical flaring` outlet, and an air passage from the outside which connects by air ducts with the primary vflue, combined with a secondary furnace having a domed ceiling through the floor of which said outlet enters, a sill around said outlet, and secondary fiues which extend from the bottom of the vertical walls of the secondary furnace upward into a common stack, feed openings in the secondary furnace, and

' In an incinerator for waste material, a primary furnace having a `feed opening,

` an inclined apron which extends downward therefrom, and grate bars at the bottom of the apron, together with a primary flue wliicli extends from the primary furnace in a horizontal direction and `is reduced in sire as it extends therefrom and which terminates in a vertical flaring outlet, and means for introducing heated air into said hue, combined with a secondary furnace having a domed ceiling through the` floor of which said outlet enters, and lines which extend from the bottom of the vertical walls of the secondary furnace, feed openings in the secondary furnace, and clean out openings in the secondary furnace as described.

ln an incinerator for waste material, a primary` furnacehaving a feed opening, an inclined apron which extends downward therefrom, a "clean out opening at the bottoni of said apron, "removable cross bars which extend across the cleanv out opening, transverse vgrate bar supports having grooves, and grate bars slidable out of the clean out opening and in such grooves, together with `a relatively long primary flue which extends from the prima-ry furnace in a horizontal direction and is reduced in" size as it extends therefrom and terminates in a vertical flaring outlet, and means for introducing heated air into said flue, combined with a secondary furnace having a domed ceiling through the floor of whichsaid outlet enters, a sill around said outlet, and flues which extend from the bottom of the ,vertical walls of the secondary furnace upward into a common stack, feed openings in the in the secondary furnace asdescribed.'

y l". lin an incinerator `for waste material, a primary furnace having a plurality of stolre holes on each side below thelevel of the lire, and having a feed opening, an in-` clined apron which extends downward therefrom, a clean out opening at the bottoni `of said apron, removable cross bars which extend across the clean out opening, transverse grate bar supports grooves, and grate bars slidable out of the clean out opening and in such grooves, together with a relatively long primary` Hue which extends from the primary furnace in a'horizoiital direction and is reduced in size as it extends therefrom and terminates in a vertical flaring outlet, and an air pasfrom the outside which connects by air ducts with the primary flue, combined with a secondary furnace having a domed ceiling through the floor of which said outlet enters, a sill around said outlet, and flues which extend from the bottom of the vertical walls of the secondary furnace upward having secondary furnace, and clean out openings iio intoa common stack, feed openings in the `Secondary furnace, Stoke holes 1n the secondf-ary furnace, and clean out openings in the f secondary furnace as described.

i 8. Inan incinerator for waste material, a primary furnace having a feed opening, an inclined apron extending downward therefrom and grate bars at the bottom thereof, together with a primary flue which extends from the primary furnace, combined with a secondary vfurnace having a domed ceiling ,through the` floor of which said flue enters, -and flues which extend from the bottomof lthe vertical walls'of the secondary furnace upwardy into a common stack, feed openings in the secondary furnace, and clean out f openings in the secondary furnace as described.

` l9. ln an incinerator for waste material, a primary furnace .having'a feed opening, au inclined apron whichv extends downfvard therefrom, and gratevbars at the'v bottom of the' apron, ltogether `with a primary iiue Vwhich extends from the primary furnace,

and an airpassage from the outside which connects by air ducts with the primary flue,

v.combined with a secondary furnace having a domed ceiling through the floor of which said'flue enters, asill around said flue, and secondary flues whichextend from the bottom of the vertical walls of the Asecondary furnace upward into a common stack, feed :rv openings in the secondary furnace, and

`clean out openings in the secondary furnace as described. y

10. In an incinerator for waste material.. a primary furnace having a feed opening, an inclined apron which extends downward therefrom, and gra-te bars at the bottom of the apron, together with a primary flue f vwhichv extends from the primary furnace,

and meansfor introducing heated air into v.said flue, combined with a secondary furnace having a domed ceiling through the -floor of which said flue enters, and secondary flues which extend from the bottom of v therefrom and grate bars at the bottom thereof, together with a primary flue which extends from the primary furnace, combined with a secondary furnace having a i ceiling through the floor of which said flue enters, and flues which extend from the bottom of the vertical'walls of the secondary furnace upward into a common stack,

i Gopes of this patent may be obtained for feed openings in the secondary furnace,

and clean out openings in the secondary furnace as described.

12. In an incinerator for waste material, a, primary furnace having a feed opening7 an inclined apron which extends downward therefrom, a clean out opening at the bot-- tom of said apron, and grate bars which are individually removable at the bottom of said clean out opening, together with a relatively long primary flue which extends from the primary furnace, and means for introducing air into said flue, combined with a secondary furnace through the floor ef which said primary flue enters, and flue-s which extend from the bottom of the ver-- tical walls of the secondary furnace, feed openings in the secondary furnace, and clean out openings in the secondary furnace as described.

13. In an incinerator for waste material,

a primary furnace adapted for burning dry waste, a lrelatively long flue which extends therefrom, and means for introducing air into said flue, combined with a secondary furnace having a ceiling and through the centerof the floor of which said flue enters, secondary flues which extend from thebottou. of the vertical walls of the secondary furnace, feed openings between the flues of thel secondary furnace, and clean out openings in the secondary furnace as described.

14. ln an incinerator, the combination of a primary furnace, with a primary flue which extends therefrom, means for admit ting heated air into said flue, and a secondary furnace having a ceiling and through the center of the floor of which said primary flue enters, a plurality of secondary flues which extend at intervals from the bottom of the side wall of the secondary furnace, together with feed openings between the flues in the secondary furnace as described.

15. ln an incinerator, the combination of a primary furnace, with a primary flue which extends therefrom and into which enter ducts from the outside air, and a sccondary furnace having a ceiling and through the center of the floor of which said primary flue enters, a plurality of secY ondary flues which extend at intervals from the bottom of the side wall of the secondary furnace, together with feed openings between the llues in the secondary furnace, and clean out openings as described.

ln testimony whereof l hereto affix my signature in presence of two witnesses.

HENRY RAGOT.

1Witnesses z HARRY R. LAWRENCE, .GARDNER 1V. PnAnsoN.

ve cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

